Abstract This paper presents that the curve of soil settlement induced by small-interval double-bore parallel shield tunnel construction conforms with the normal distribution, and summarizes the calculation method for surface settlement. Aiming at the deficiencies of various calculation methods, the modified 2D Peck formula is established to calculate the deep soil settlement while considering the asymmetry of the settlement curve. Based on the research of calculation parameters, the measured results show that iTotal / iAdvancing tunnel (i: width coefficient of the settlement trough) decreases linearly with the increase of h/D, thus giving the formula for iTotal and ηTotal (η : Soil loss rate). Additionally, this paper firstly proposes the coefficient C of relative horizontal distance between two tunnel axes (C＜0.6; C=L/(h+R)), to which the shape of the total ground settlement curve is related. According to the case study, the predicted values agree with the measured ones and the calculation is relatively simple.
Abstract：
This paper presents that the curve of soil settlement induced by small-interval double-bore parallel shield tunnel construction conforms with the normal distribution, and summarizes the calculation method for surface settlement. Aiming at the deficiencies of various calculation methods, the modified 2D Peck formula is established to calculate the deep soil settlement while considering the asymmetry of the settlement curve. Based on the research of calculation parameters, the measured results show that iTotal / iAdvancing tunnel (i: width coefficient of the settlement trough) decreases linearly with the increase of h/D, thus giving the formula for iTotal and ηTotal (η : Soil loss rate). Additionally, this paper firstly proposes the coefficient C of relative horizontal distance between two tunnel axes (C＜0.6; C=L/(h+R)), to which the shape of the total ground settlement curve is related. According to the case study, the predicted values agree with the measured ones and the calculation is relatively simple.
WU Hua-Jun-1,
Wei,
GANG 2
.The Calculation of Soil Settlement Induced by Construction of Twin Parallel Shield Tunnels with a Small-Interval[J] MODERN TUNNELLING TECHNOLOGY, 2014,V51(2): 63-69
2014, Vol. 51 